Show simple item record

dc.contributor.authorCox, Harry Wilmoreen_US
dc.date.accessioned2014-03-14T21:40:52Z
dc.date.available2014-03-14T21:40:52Z
dc.date.issued1977-10-15en_US
dc.identifier.otheretd-07212010-020120en_US
dc.identifier.urihttp://hdl.handle.net/10919/43824
dc.description.abstractMicrocystis aeruginosa is known widely for the obnoxious nature of its bloom. Problems resulting from blooms of the alga include: death of fish and other aquatic life, clogging of filter systems in water treatment plants, taste and odor problems, and death of cattle and water fowl via extracellular polypeptides. Blooms of this nuisance alga have historically occurred in waters receiving pollution from sewage effluents or runoff from agricultural lands. Studies have shown that 2,4-0ichlorophenoxyacetic acid (2,4-0) and 2,4,5-Trichlorophenoxyacetic acid (2,4,S-T) mimic the metabolic activities of the plant hormone indoleacetic Acid (IAA). IAA has been shown to stimulate the growth of some green and blue-green algae. Recent evidence suggests that blooms of Microcystis aeruginosa were triggered when the herbicides 2,4-D and 2,4,5-T were introduced to lakes and rivers. The results of this study showed that batch cultures of non-axenic Microcystis aeruginosa containing 2,4-D and 2,4,5-T exhibited significantly more growth than controls over a wide range of herbicide concentrations. Growth in 2,4-D treated cells was statistically significant from the control at a = 0.05 at concentrations as low as 10 -7 M (0.020 mg/l) and 10 -5M (2.5 mg/l) for 2,4,5-T. Also, a plot of maximum cell yield values versus herbicide concentrations resulted in a linear relationship.en_US
dc.format.mediumBTDen_US
dc.publisherVirginia Techen_US
dc.relation.haspartLD5655.V855_1977.C73.pdfen_US
dc.subjectTrichlorophenoxyacetic aciden_US
dc.subject.lccLD5655.V855 1977.C73en_US
dc.titleThe growth promoting effect of 2,4-Dichlorophenoxyacetic acid (2,4-D) and 2,4,5-Trichlorophenoxyacetic acid (2,4,5-T) on Microcystis aeruginosa.en_US
dc.typeThesisen_US
dc.contributor.departmentEnvironmental Sciences and Engineeringen_US
dc.description.degreeMaster of Scienceen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineEnvironmental Sciences and Engineeringen_US
dc.contributor.committeechairBoardman, Gregory D.en_US
dc.contributor.committeememberHoehn, Robert C.en_US
dc.contributor.committeememberOrcutt, David M.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-07212010-020120/en_US
dc.date.sdate2010-07-21en_US
dc.date.rdate2010-07-21
dc.date.adate2010-07-21en_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record